The phrase "as he referenced" is correct and usable in written English.
It can be used when you want to indicate that someone has mentioned or alluded to something previously.
Example: "The findings of the study were significant, as he referenced in his earlier presentation."
Alternatives: "as he mentioned" or "as he noted".
"Can we call this the strategery room?," asked Karl Rove, allowing a smirk to cross his face as he referenced the Bush-inspired malapropism.
Instead, it was Mr. Obama who sought to engage Mrs. Clinton as he referenced her role in trying to overhaul the nation's health insurance system during her husband's first term as president and seized on her statement that she could not be influenced by contributions from lobbyists.
"We're not going to get ourselves arrested just to protect the lair pieces," Pete was explaining, as he referenced some secondary structures that would be accompanying the bear.
"It's a very different climate now," Lee said as he referenced the comparatively easy era in which he was able to get films like 1992's "Malcolm X" made.
"I don't think that's true," Sarandos said, as he referenced Netflix shows such as the local French series "Marseille". "We won't take one cent of French tax dollars to produce the show.
Kayyem noted that Mateen was not inspired by foreign events, as he referenced the Tsarnaev brothers and the Boston bombing incident in his 9-1-1 call but did not mention Paris or Brussels.
Gesticulating in a manner similar to that used by Emwazi, who was also known as Jihadi John, the unnamed terrorist repeatedly waves a gun at the camera as he references British airstrikes in Syria.
If I'm tired, I should take a nap!" he finishes, laughing as he references the now famous bitchy scene with Becky weeks earlier.
Wondering why he has not seen any of his GE colleagues, Jack's office assistant Jonathan (Maulik Pancholy) suggests that maybe they are the last people on Earth, as he references the 2007 film I Am Legend, "You're Will Smith and I'm the dog!" In I Am Legend, Will Smith's character is the last healthy human in New York City and lives with his dog.
As an example, he referenced an interactive voice ad that asked an Alexa user if they were planning to watch the NBA finals game that day.
As Iannucci happily recalled, "He referenced 'The West Wing' — the show.
